System information transmission with coverage recovery

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a grant scheduling repetition-based system information block transmissions for the UE, the grant indicating a mapping configuration identifying time-frequency resources for a second repetition of a system information block transmission relative to a first repetition of the system information block transmission. The UE may receive, in a first subset bandwidth of a system bandwidth, the first repetition of the system information block transmission according to the grant. The UE may receive, in a second subset bandwidth of the system bandwidth, the second repetition of the system information block transmission according to the grant and based at least in part on the mapping configuration.

What is claimed is: 
     
       1. An apparatus for wireless communication at a user equipment (UE), comprising:
 a processor, and 
 memory coupled to the processor and configured to:
 receive a grant scheduling repetition-based system information block transmissions for the UE, the grant indicating a mapping configuration identifying time-frequency resources for a second repetition of a system information block transmission relative to a first repetition of the system information block transmission; 
 receive, in a first subset bandwidth of a system bandwidth, the first repetition of the system information block transmission according to the grant; 
 receive, in a second subset bandwidth of the system bandwidth, the second repetition of the system information block transmission according to the grant and based at least in part on the mapping configuration; and 
 select a set of time-frequency resources for the second repetition of the system information block transmission based at least in part on an interleaving mapping indicated in the grant, wherein the mapping configuration comprises the interleaving mapping. 
 
 
     
     
       2. The apparatus of  claim 1 , wherein the memory coupled to the processor is further configured to:
 detect, in the grant, a repetition flag set to a value indicating that the second repetition of the system information block transmission will occur; and 
 select the set of time-frequency resources for the second repetition of the system information block transmission based at least in part on the repetition flag and a time domain resource allocation indicated in the grant. 
 
     
     
       3. The apparatus of  claim 1 , wherein the memory coupled to the processor is further configured to:
 detect, in the grant, a redundancy version set to a value indicating that the second repetition of the system information block transmission will occur; and 
 select the set of time-frequency resources for the second repetition of the system information block transmission based at least in part on the redundancy version and a time domain resource allocation indicated in the grant. 
 
     
     
       4. The apparatus of  claim 1 , wherein the set of time-frequency resources associated with the interleaving mapping comprises a cyclic shifting of the system bandwidth, cyclic shifting of one or more resource blocks, or a combination thereof. 
     
     
       5. The apparatus of  claim 1 , wherein the memory coupled to the processor is further configured to:
 determine a synchronization signal block bandwidth based at least in part on the system bandwidth, wherein the first subset bandwidth and the second subset bandwidth are based at least in part on the synchronization signal block bandwidth. 
 
     
     
       6. The apparatus of  claim 1 , wherein the memory coupled to the processor is further configured to:
 perform a retuning operation to retune from the first subset bandwidth to the second subset bandwidth between receiving the first repetition and the second repetition of the system information block transmission, wherein the second subset bandwidth comprises a different bandwidth relative to the first subset bandwidth. 
 
     
     
       7. The apparatus of  claim 1 , wherein the memory coupled to the processor is further configured to:
 refrain from performing a retuning operation to retune from the first subset bandwidth to the second subset bandwidth between receiving the first repetition and the second repetition of the system information block transmission, wherein the second subset bandwidth comprises a same bandwidth relative to the first subset bandwidth. 
 
     
     
       8. An apparatus for wireless communication at a user equipment (UE), comprising:
 a processor; and 
 memory coupled to the processor and configured to:
 receive a first repetition of a system information block transmission according to a first grant scheduling the first repetition; 
 receive a second repetition of the system information block transmission according to a second grant scheduling the second repetition, the receiving based at least in part on a scheduling constraint associated with the first grant and the second grant that maintains one or more transmission parameters between the first grant scheduling the first repetition and the second grant scheduling the second repetition of the system information block transmission; and 
 detect a flag in the first grant set to a value to indicate whether contents of the system information block transmission are shared between the first repetition and the second repetition. 
 
 
     
     
       9. The apparatus of  claim 8 , wherein the memory coupled to the processor is further configured to:
 receive the first repetition in a first subset bandwidth of a system bandwidth and receiving the second repetition in a second subset bandwidth of the system bandwidth, wherein the second subset bandwidth comprises a different bandwidth relative to the first subset bandwidth. 
 
     
     
       10. The apparatus of  claim 8 , wherein the memory coupled to the processor is further configured to:
 receive the first repetition in a first subset bandwidth of a system bandwidth and receiving the second repetition in a second subset bandwidth of the system bandwidth, wherein the second subset bandwidth comprises a same bandwidth relative to the first subset bandwidth. 
 
     
     
       11. The apparatus of  claim 10 , wherein the memory coupled to the processor is further configured to:
 select a set of time-frequency resources for the second repetition of the system information block transmission based at least in part on a redundancy version set to a value indicating that the second repetition of the system information block transmission will occur. 
 
     
     
       12. The apparatus of  claim 8 , wherein the scheduling constraint comprises a shared modulation and coding scheme, a shared frequency domain resource allocation, a shared interleaved interleaving mapping, a shared redundancy version, or a combination thereof. 
     
     
       13. An apparatus for wireless communication at a network entity, comprising:
 a processor; and 
 memory coupled to the processor and configured to:
 transmit a grant scheduling repetition-based system information block transmissions for a user equipment (UE), the grant indicating a mapping configuration identifying time-frequency resources for a second repetition of a system information block transmission relative to a first repetition of the system information block transmission; 
 transmit, in a first subset bandwidth of a system bandwidth, the first repetition of the system information block transmission according to the grant; 
 transmit, in a second subset bandwidth of the system bandwidth, the second repetition of the system information block transmission according to the grant and based at least in part on the mapping configuration; and 
 select a set of time-frequency resources for the second repetition of the system information block transmission based at least in part on an interleaving mapping indicated in the grant, wherein the mapping configuration comprises the interleaving mapping. 
 
 
     
     
       14. The apparatus of  claim 13 , wherein the memory coupled to the processor is further configured to:
 detect, in the grant, a repetition flag set to a value indicating that the second repetition of the system information block transmission will occur; and 
 select the set of time-frequency resources for the second repetition of the system information block transmission based at least in part on the repetition flag and a time domain resource allocation indicated in the grant. 
 
     
     
       15. The apparatus of  claim 13 , wherein the memory coupled to the processor is further configured to:
 configure, in the grant, a redundancy version set to a value indicating that the second repetition of the system information block transmission will occur; and 
 select the set of time-frequency resources for the second repetition of the system information block transmission based at least in part on the redundancy version and a time domain resource allocation indicated in the grant. 
 
     
     
       16. The apparatus of  claim 13 , wherein the set of time-frequency resources associated with the interleaving mapping comprises a cyclic shifting of the system bandwidth, cyclic shifting of one or more resource blocks, or a combination thereof. 
     
     
       17. The apparatus of  claim 13 , wherein the memory coupled to the processor is further configured to:
 determine a synchronization signal block bandwidth based at least in part on the system bandwidth, wherein the first subset bandwidth and the second subset bandwidth are based at least in part on the synchronization signal block bandwidth. 
 
     
     
       18. The apparatus of  claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:
 perform a retuning operation to retune from the first subset bandwidth to the second subset bandwidth between transmitting the first repetition and the second repetition of the system information block transmission, wherein the second subset bandwidth comprises a different bandwidth relative to the first subset bandwidth. 
 
     
     
       19. The apparatus of  claim 13 , wherein the memory coupled to the processor is further configured to:
 refrain from performing a retuning operation to retune from the first subset bandwidth to the second subset bandwidth between transmitting the first repetition and the second repetition of the system information block transmission, wherein the second subset bandwidth comprises a same bandwidth relative to the first subset bandwidth. 
 
     
     
       20. An apparatus for wireless communication at a network entity, comprising:
 a processor; and 
 memory coupled to the processor and configured to:
 transmit a first repetition of a system information block transmission according to a first grant scheduling the first repetition for a user equipment (UE); 
 transmit a second repetition of the system information block transmission according to a second grant scheduling the second repetition, the transmitting based at least in part on a scheduling constraint associated with the first grant and the second grant that maintains one or more transmission parameters between the first grant scheduling the first repetition and the second grant scheduling the second repetition of the system information block transmission; and 
 set a flag in the first grant to a value to indicate whether contents of the system information block transmission are shared between the first repetition and the second repetition. 
 
 
     
     
       21. The apparatus of  claim 20 , wherein the memory coupled to the processor is further configured to:
 transmit the first repetition in a first subset bandwidth of a system bandwidth and transmitting the second repetition in a second subset bandwidth of the system bandwidth, wherein the second subset bandwidth comprises a different bandwidth relative to the first subset bandwidth. 
 
     
     
       22. The apparatus of  claim 20 , wherein the memory coupled to the processor is further configured to:
 transmit the first repetition in a first subset bandwidth of a system bandwidth and transmitting the second repetition in a second subset bandwidth of the system bandwidth, wherein the second subset bandwidth comprises a same bandwidth relative to the first subset bandwidth. 
 
     
     
       23. The apparatus of  claim 22 , wherein the memory coupled to the processor is further configured to:
 select a set of time-frequency resources for the second repetition of the system information block transmission based at least in part on a redundancy version set to a value indicating that the second repetition of the system information block transmission will occur. 
 
     
     
       24. The apparatus of  claim 20 , wherein the scheduling constraint comprises a shared modulation and coding scheme, a shared frequency domain resource allocation, a shared interleaving mapping, a shared redundancy version, or a combination thereof.